Does this mount directly to factory points or will I need to drill holes?

This system uses factory roof attachment points — no drilling. Just locate your existing mounts and attach the crossbars there.

What weight capacity should I assume for cargo?

Capacity depends on your vehicle's roof load rating. Check your owner's manual for the exact limit before loading, then distribute weight evenly across the bars.

Does aluminum need any treatment before installation?

Aluminum resists corrosion on its own, but you can wipe it down with a cloth before mounting. No primer or paint prep is necessary.